Fire-door opener.



B. (3. KING.

FIRE DOOR OPENER.

APPLIOATIOH mum 001.30, 1908.

. I Patented 00s. 18, 1910.

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E. 0. KING.

FIR-I 300E OPENER.

'APPLmATzoH nun: 001. so. was

Patented Oct. 18, 1910 3 SHEETS-SHEET 2.

Elnmmto film's I Hm EDXVARD C. KING, OF CHARLOTTESVILLE. VIRGINIQ.

TIRE-DOOR OPENER.

max m.

Specification of Letters Patent.

Patented ()et. 18. 1910.

Application flied Octoter 30. 1908. Serial No. 463,279.

To 11?! whom. it may (TOIKH'H-I tie it ioiown that l. liowino C. Rise. a citizen of the linited States. residing! at Chariottesi'ille. in the county of Altn-niarlc and State'ot' Virginia. have-invented new and useful Improvements in Fire-Door Openers. ot' \vhieh the following a specification. I i V 'lhisinvention relate to tire door openers for furnaces and the like. and has for an ohjct't to provide means for automatically opening and closing the same. thus enab ing a tirenzan or tin-nav operator to use hoih hands in, the handling of the shovel.

A further ol ject it this invention is to i provide a main air intake valve for controltin; air from a suitahie reserv ir t an auto math-:dly operated valve adapted to actuate a sliding piston. whit-h latter is connected with the door t'iperat'ing mechanism.

A furtherobject of the invention is to pro 1 vide automatically operated means for etos elearly illustrate the invention.

.ried therel v.

ing the su uiieinontal inlet valve after the piston has hecn operated to open the door.

other ohjects and advantag s will he apparent as the nature of the invention is hettet' set forth. and it will he understood that hangeswvithin the scope of the elaini may he resorted to without departing from the spirit of the invention.

in the drawings. forming a portion of this specifieatiou and in hich like niuncrals of reference indimite'siniilar parts in the several views. Figure l is a front view of a furnace door showing, the improved opener connected thereto, t'ntl'ts' being ln-ohen to more Fig. 2 is a detail view of the piston cylind r and its rod showing the lever actuating: element ear- Fig. 3 is a detail sectional view of the supplemental valve showing-the exhaust port in communication with the piston cylinder and its inlet port closed with the intake pipe. Fig. 4 is a view of the valve. similar to that. of Fig. 3, the valve being in a ditierent position, or full open.

- .Referring now more particularly to the drawings, there. is shown a portion of a furnace wall A having a fire door opening B formed therein, and at each side of the said opening, is a vertical guide member C. It will be seen that the said members U are spaced from each other. and that they receive the ends'of door sections D and E. One of the inemhers G has an enlarged portion F formed integral therewith, and set t r cured to the said portion is a pair of; horillaoh ln'at'liel tivelv retain and supporta vertical cylinder 3. The saiMvhnder C:t1'l'i(';-j at the lower end thereot a head l. and at its upper end a head 5 which is. sonicndiat thick r than the former head and isprovided with a centrally tot-axed passage in which worksa piston rod 7 having at in. lower end a piston head huvin; its peripheral surface engaged with the walls of the said cylinder. At the upper endrthe red T provided with a stem or pin 10 arranged to lie in parallel relation with respett' to the lei-ad 5 and theouter end of the said stem or pm pivot-ally rereives the upper end of an element 11. A lever '12 is. pivoted )tlttl\\';t hetween its ends to the. portion F of one guideineniher C as shown at 13 and the inner end of the said lever provided with an elongated slot, 14 to reeeive a bolt or stud 15 extending from f the door section 1*). ()tll\\':-ll'(ll:.' of the pivot point 13. the lever 12 is provided withan elongated slot. it) which receives a pin 17 carried h v the lower end 18 of the element: ll. A lever 29 is pivoted as shown at 20 adjacent to its outer end to the portion 1* and is provided with elongated slots :11 and 3'3. the latter receiving a stud J3 propa-tinfrom the door seetion l) and .tlieformer receiving the pivot pin 24 at the upper end of a'tinlc 25. The said link is disposed nornmllv at an angle as shown in Fig. l of the drmvings and has its lower end pivoted to the lever 12 as indieated at, 26.

Rods JT and 33 are threaded at. their upper ends and are engaged in passages :29 formed in the head 5. The inner portion of the said rods are located within the cylinder 3 and slidahly receives a circular head 30 having its peripheral edge engaged with the 'alls of the cylinder and this head. it may he mentioned. is located norniall in spaced parallel relation above the piston head 5. A helical expansion spring 31 is located within the evlinder 3 and has its ends di posed between the heads and 30 and serves normally to hold the latter at the downward limit of its movement. The threaded ends of the rods 27 and '28 receive adjusting nuts 32 adapted for operation to vary the strength or tension of the spring 31.

An air or suitable fluid pipe, is shown at 50 extcm'hnt sullicient to actuate the lever 12 any-suitable source of fluid supply, and the saidpipe carries a manually operated valve therewith a pipe 38 disposed in alinement- 'arenate arms 4% to which a trip element 45 stated that the valve ilicis normally closed,

this position of the valves, thelevcr 1: rests cicntl to cause the doorjgseetions to open i! i t 7 973,051

33 and may, as is obvious, be connected to o An automaticall operated valve is shown at 35 and has a suitable casing 36 in which is secured one end of a pipe 37, the other end being connected to the valve-34, as shown. The casing 36 has also connected with thepipe 37 and the said pipe 38 is secured atits opposite end to the lower head 4 of the cylinder 3. The valve 35 is termed a rotary valve and has a stem 39 to which is secured a lever 40, and the said valve is provided with a straight inlet port ll and an arcuate exhaust port 42, the latter being adapted to register at its ends with the exhaust port 43 in the casing 36 and with the pipe 38 respectively, as shown in Fig. 3. The brackets 1 hercinbcfore set forth carry is pivoted having a head 46 pr ded with projections 47, 48, and 45) adapted to be engaged by a leaf spring 50 secured at its ends tothe brackets 1. The element 45 has a pin 51 extending horizontally from its arm 52 and receives the upper end ot' a rod 53 formed in sections 54 and 55, and as shown, the said sections are connected to eachother by a turnbuckle 56 to properly adjust the movement of the lever 40. The section 5t of the rod 53 has mounted thereon a book 57 t6 receive the outer end of the lever 12 for a purpose to be'hereinafter described.

In operation of the device, it may he and that the port 4t in the valve 35 normally assnuu-s an inclined position as shown in Fig. 1 sothat it only slightly registers with the pipes :37 and 3S rcspectivcl v In at its outer cud in the hook 57 and the pitston at thc downward limit of its movement. .tsslnning the valve ill to be in an open posit ion, the lluidwill he frce'to travel without rcstriclim: until it reaches the valve 35. *As this valve initialh registers; to a slight extent with thc piston cylinder and with the fluid pipe 37, lhiid beneath the piston will act thereagainst to lift it to a slight causing it to be disengaged from the lmoit 57. Under the tension of thespring 5U the head 4; will then he actuatcd'to operate the valve lcver 40 to ause the port oi the valve to open in full registration with the piston ylinder and the tlnid pipe 37, whereby the itu-reascd volume of prcssnre beneath the piston will act to more the lattcr rapidly in ,ait upward direction. When the piston comes 'i n -g;ontact with flit/spring pressed lnratl Iltl'i'u'rthcr movcmc it in an upward direction er the piston w; l be retarded sullislowl v. lu upward movement. of the piston against the tension of the spring the free end of the lever 12 Will he moved into contact with the pin 51, whereby the head 46 will be again actuated to impart the desired rotary movement to the valve to cause its exhaust port 42 to register with the pis-v ton' cylinder whereby the spent fluid may be conveyed to the atmosphere and the valve 35 and the piston 8 restored to their initial positions. When the lever 12 is in the position shown in Fig. l of the drawings its engagement with the hook 57 will be sullicient to hold the head in the position shown but as soon as the said lever is released from the hool; the head will be released and the spring will exert its tension to impart the desired movenu-nt thereto. As soon as the air is finally exhausted, the lever is thrown downwardly, engaging the hook to the extent that the valve 35 is rotated to cause it to assume a po-ition so that its port 41 lies in its normal inclined position. It will be seen that a novel. simple and inexpensive incrhanian is employed that will be automatic in action to opt-n and close the opening ll of the wall A. llv providing the turn-bmrlcle 56. the sections 54 and 55 can be adjusted or moved toward each other, consequcntly operating thc lcvcr -10 to change the position of the port 41. 1

l clai|n:-

In appara us of the class described, a pair of sliding door sections. a fluid receiving cylinder, :1 P1510!) 111 said cylinder, a sliding head located in the tt \'llll ltl, means 101' adjusting the head longitudinally of the cyl *mimnunication between the pipe and the said cylinder. he cxhan-zt. port of the. valve being adapted to register with the said cylhide! and with the port of the valve casing. and an automatically control-led spring actuated trip clcnn-nt opcralivclv runnt'clctl with the valve to actuate the same and operated in unison with the movements of the door sections.

In testimony whereof I allix my signature in presence of two witnesses.

EDWARD U. KING.

\Vi t ncsses Z J. ll. lloxuss, \V. \V. lionrru'rs. 

